Question

The reaction of hydrochloric acid and sodium hydroxide is
exothermic.

The equation is'. HCl + NaOH ---> NaCl + H20

In one experiment, a student placed 50.0 mL of 1.00 M HCl at 25.5
degrees C on a
coffee cup caìorímeter. To this was added 50.0 mL of L00 M NaOH
solution also at
25.5 degrees C. The mixture was stirred, andthe temperaíure quickly
increased to a
maximum of 37.8 degrees C.

What is the heAt of reaction in joules per mole of HCl?

Because the solutions are dilute, we can assume that their specitîc
heats are close to
that of Water, 4.18 C, and that their densities are 1.00 g/mL. We
can also assume
that no heat is lost to the coffee cup itself or to the surrounding
air.